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NEET Chemistry MCQ
Carboxylic Acids And Their Derivatives Mcq Neet Chemistry
Quiz 2
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Q.1
CH3CHO + H2NOH → CH3-CH = N -OH .... [ IIT 1997] The above reaction occurs at
0%
a) pH = 1
0%
b) pH = 4.5
0%
c) pH = 12
0%
d) any value of pH
Explanation
In highly acidic medium NH2OH forms salts with acidic molecule and loses its capacity to acts as nucleophile Answer : (b)
Q.2
Oxalic acid may be distinguished from tartaric acid by
0%
a) NaHCO3
0%
b) litmus paper
0%
c) ammoniacal silver nitrate
0%
d) phenolphthalein
Explanation
Tartaric acid reduces Tollen reagent Answer : (c)
Q.3
HCHO and HCOOH are detected by ... ... [ DEC 2006]
0%
a) NaHCO3
0%
b) CuSO4/NaOH
0%
c) AgNO3/NH4OH
0%
d) All of these
Explanation
HCHO does not give any effervescence of CO2 when reacts with NaHCO3 Answer : (a)
Q.4
Lactic acid on oxidation by alkaline potassium permanganate gives
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a) Tartaric acid
0%
b) Pyruvic acid
0%
c) Cinnamic acid
0%
d) Propionic acid
Explanation
Answer : (b)
Q.5
COOH group in a carboxylic acid can be replaced by 'H" by heating the acid with
0%
a) Zn with HCl
0%
b) H2 inpresence of nickel
0%
c) sodalime
0%
d) bromine and concentrated aqueous alkali
Explanation
R - COOH + sodalime → R - H Answer : (c)
Q.6
When an acyl chloride is heated with Na salt of a carboxylic acid, the product is ... ...[ DEC 2003]
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a) Aldehyde
0%
b) Alkene
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c) Anhydride
0%
d) Ester
Explanation
Answer : (c)
Q.7
Formic acid and acetic acid differ in which of the following respect?
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a) Blue litmus reaction
0%
b) Replacement of hydrogen by sodium
0%
c) Formation of ester with alcohol
0%
d) Reduction of fehling solution
Explanation
Formic acid have H-CO- gropu reduces Fehling's solution, whereas acetic acid does not Answer : (d)
Q.8
The major product of nitration of Benoic acid is ... ...[ IIT 1993]
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a) 3-Nitrobenzoic acid
0%
b) 4- Nitrobenzoic acid
0%
c) 2-Nitrobenzoic acid
0%
d) 2-4-Dintrobenzoic acid
Explanation
Answer : (a)
Q.9
Which salt can be produced by the reaction of carbon monoxide and caused soad (NaOH)
0%
a) HCHO
0%
b) C2H2O4
0%
c) CH3COOH
0%
d) HCOONa
Explanation
Answer : (d)
Q.10
tion :Formic acid reduces mercuric chloride to mercurous chloride on heating, while acetic acid does not Reason : Formic acid is stronger than acetic acid
0%
a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion
0%
b) The Assertion and Reason are true but Reason is not correct explanation of Assertion
0%
c) Assertion is true but, Reason is false
0%
d) Assertion is false but, Reason is true
Explanation
Reducing nature of formic acid is due its oxidizing nature Answer : (b)
Q.11
A is higher phenol and B is an aromatic carboxylic acid. Separation of a mixture of A and B can be carried out easilyby having a solution
0%
a) Na2CO3
0%
b) NaHCO3
0%
c) NaOH
0%
d) Lime
Explanation
Phenol does not react with NaHCO3 whereas carboxylic acids produce sodium carboxylate with NaHCO3 Answer : (b)
Q.12
Than One Correct Answer Q41) Proligneous acid is used in the manufacture of
0%
a) propanone
0%
b) methanol
0%
c) propanal
0%
d) ethanal
Explanation
Answer : (a,b)
Q.13
Which of the following compounds gives benzoic acid on oxidation? [ IIT 1993]
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a) Chlorophenol
0%
b) Chlorotoluene
0%
c) Chlorobenzene
0%
d) Benzyl chloride
Explanation
Answer : (d)
Q.14
Which of the following compounds will evolve hydrogen on treatment with Na metal?
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a) CH3COOH
0%
b) C2H5OH
0%
c) both a and b
0%
d) none
Explanation
Both C2H5OH and CH3COOH have acidic hydrogen Answer : (c)
Q.15
Benzaldehyde reacts with excess of anhydrous ethyl alcohol in the presence of HCl, give ... ...[ Roorkee 1995]
0%
a) C6H5COCl
0%
b) C6H5COOC2H5
0%
c) C6H5CH(OC2H5)2
0%
d) C6H5CH2Cl
Explanation
Answer : (c)
Q.16
The silver salt of fatty acid on refluxing with an alkyl halide gives an ... ..[ Karnataka CET 2004]
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a) Amine
0%
b) Acid
0%
c) Ester
0%
d) Ether
Explanation
RCOOAg + R'X → RCOOR' + AgX Answer : (c)
Q.17
Amides on treatment with Br2 and KOH are converted into amines, the reaction is known as
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a) H.V.Z.reaction
0%
b) Hofmann's bromamide reaction
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c) Hofmann's methylation
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d) Gabriel phthalimide reaction
Explanation
The given reaction is known as Hofmann's bromamide reaction Answer : (b)
Q.18
ion Q47) The reaction is called
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a) Sandmeter reaction
0%
b) Cannizzaro reaction
0%
c) Hell-Volhard Zelinsky reaction
0%
d) Reimer-Tiemann reaction
Explanation
α-halogen of carboxylic acids in presence of red P is known as Hell-Volhard Zelinsky reaction Answer : (c)
Q.19
ion Q48) Compound X is
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a) CH3COOH
0%
b) Br CH2 - COOH
0%
c) (CH3CO)2O
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d) CHO-COOH
Explanation
Given reaction is Perkin reaction, hence X must be acetic anhydride (CH3CO)2O, since sodium acetate is used as catalyst. Answer : (c)
Q.20
When propanamide reacts with Br2 and NaOH then which of the following compounds is formed?
0%
a) Ethyl amine
0%
b) Ethyl alcohol
0%
c) Propyl alcohol
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d) Propyl amine
Explanation
It is Hofmann bromamide reaction CH3CH2CONH2 + Br2 + 4NaOH → CH3CH2NH2 + 2NaBr + Na2CO3+2H2O Answer : (a)
Q.21
Pick out the unsaturated fatty acid from the following .... [ KCET 2004]
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a) Steric acid
0%
b) Lauric acid
0%
c) Oleic acid
0%
d) Palmitic acid
Explanation
Answer : (c)
Q.22
tion : Ethyl acetoacetate gives reddish-violet colour with FeCl3(aq) Reason : Ethyl acetoacetate shows keto-enol isomerism
0%
a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion
0%
b) The Assertion and Reason are true but Reason is not correct explanation of Assertion
0%
c) Assertion is true but, Reason is false
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d) Assertion is false but, Reason is true
Explanation
Answer : (a)
Q.23
The IUPAC name of caproic acid is
0%
a) hexanoic acid
0%
b) octanoic acid
0%
c) pentanoic acid
0%
d) heptanoic acid
Explanation
Answer : (a)
Q.24
In the presence of aluminium ethoxide, aldehydes get converted into esters. The reaction is known as
0%
a) Aldol condensation
0%
b) Beckmann's rearrangement reaction
0%
c) Tischenko reaction
0%
d) Schmidt reaction
Explanation
Tischenko reaction Answer : (c)
Q.25
When acetamide reacts with Br2 and caustic soda, then we get
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a) Acetic acid
0%
b) Bromoacetic acid
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c) Methyl amine
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d) Ethyl amine
Explanation
Inpresence of Br2, KOH CH3CONH2 → CH3NH2 ( methyl amine) Answer : (c)
Q.26
ion Q55) The acid produced (A) in the sequence given below is .... ...[ DEC 2000 ]
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a) Succinic acid
0%
b) Melonic acid
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c) Oxalic acid
0%
d) Maleic acid
Explanation
Answer : (a)
Q.27
Which of the following statements is wrong?
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a) Benzaldehyde does not reduce Fehling's solution
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b) Formic acid is stronger than acetic acid
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c) Lactic acid does not answer the silver mirror test
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d) o-bromobenzoic acid is weaker than o-chlorobenoic acid
Explanation
Lactic acid is reducing agent Answer : (c)
Q.28
Which of the following will have lowest pH when one mole of each of the following is hydrolysed with water? [ IIT 1990]
0%
a) CH3COCl
0%
b) (CH3CO)2O
0%
c) CH3CONH2
0%
d) CH3COOC2H5
Explanation
CH3OCl yields HCl besides CH3COOH on hydrolysis. HCl is strong acid Answer : (a)
Q.29
The reaction product of the compound 'A' with excess of methyl magnesium iodide followed by acidification yields t-butanol. The compound A is
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a) ethanal
0%
b) methyanal
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c) methyl ethanoate
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d) propanal
Explanation
Answer : (c)
Q.30
The conversion of CH3OH to CH3COOH can be brought in by
0%
a) H3PO3
0%
b) KMnO4
0%
c) K2Cr2O7
0%
d) CO + Rh
Explanation
Answer : (d)
0 h : 0 m : 1 s
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